From: Anders Sandberg (asa@nada.kth.se)
Date: Sat Oct 02 1999 - 10:39:31 MDT
Brian Atkins <brian@posthuman.com> writes:
> "Eliezer S. Yudkowsky" wrote:
> >
> > http://www.mpg.de/news99/news44_99.htm
...
>
> This is not clearly worded... are they saying that they have used
> a laser to store data on neurons, or that they have used a laser
> to discover that neurons naturally store info on their surfaces?
They have been using infrared light to image the neurons, and UV to
activate glutamate packed into "cages" at very precise spots (well,
rather precise - that spot is still of the same size as the
synapse). What they found was that LTD could be induced on just single
synapses, which shows that information can be stored individually in
synapses. IMHO *very* nice research, and a method that is bound to be
popular.
Does this lead to a Copernikean revolution in neurology? No. I think
most people in the field would have guessed LTD and LTP are synapse
specific, possibly with long-range effects (maybe through NO), so this
is just confirmation of a long-standing suspicion. If they show that
just a small piece of the synapse can be specific, then I will start
to worry and experiment with changing my own models.
-- ----------------------------------------------------------------------- Anders Sandberg Towards Ascension! asa@nada.kth.se http://www.nada.kth.se/~asa/ GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y
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